Temporary binder.



'PATENTED FEB. 25, 1908.

f0. 1) TRUSSELL. TEMPORARY BINDER.. APPLICATION FILED JUNE 16, 1907.

. ATTORNEY 4g ANVENTOH 25 of sheet-holding prongs.

- view of the spring plate.

40 side of spring plate '1.

50 opposite prong.

fem

STARS PATENT OFFICE.

CLARENCE D. TRUSSELL, OF NEW YORK, N. Y., ASSIGNOR TO TRUSSELLMANUFACTURING COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORKTEMPORARY BINDER.

Specification of Letters Patent.

Patented Feb. 25, 1908.

Application filed June 15. 1907- Serial No. 379.106.

T all whom it may concern:

Be it known-that I, CLARENCE D. TRUS- SELL, a citizen of the UnitedStates, residing at the borough of Brooklyn, New York city,

-in the county of Kings and State of New York, have invented certain newand useful Improvements in Temporary Binders, of which the following isa specification.

My invention relates to temporary binders of the type shown in myapplication Serial sertion or withdrawal of sheets.

Figure 1 of the drawings is a perspective view of the temporary binderin open position. Fig. 2 is a side view of a pair of the sheet-holdingprongs in closed position, the parts below being shown in section.

Fig. 3 is a similar view showing the prongs open for the withdrawal ofsheets. Fig. 41s a similar view showing the sheet-holding prongs andcovers closed. Fig. 5 is a side view of a pair Fig. 6 is a plan Fig. 7is a rear view of the same showing the binding plate.

j Referring to the drawings, 1 is a spring plate adapted to be securedto the back 2 and covers by means of the binding plate 3 whose endprojections 4 are bent upward and inward through the notches 5 in theends of spring plate 1 to clamp together said spring plate 1 and thebinding plate 3 so as to hold S5'securely between said plates thebinding strip 6 which extends on either side of the metal spring plate 1between the outer layer 7 of the covers and a stiffening board 8 whoseinner end is adjacent to and parallel with the Each cover has afinishing layer 9 overlying the stiffening board 8. The spring plate 1is com osed of a curved base portion 10, from w ch are bent inwardly twoparallel wings 11 which are provided with oppositely arranged notches12. The sheet-holding prongs 13 are made in two pieces, one piece havingat its lower end a tongue 14 adapted to engage a groove or notch15 inthe 'lowerend of the The lower face of groove 15 is prolonged into thetongue 16, which is adapted to contact with the lower face of theopposite prong to sto the opening movement of the prongs, as Eestillustrated in Fig.

3. Each prong has a notch 17 on its lower edge adapted to be engaged bythe inner edge 18 and one of the notches 12 in spring plate 1. The uppersides of notches 17 are cut away at an angle so that they will notcontact with thewings 1-1 when the prongs arein the open position, asbest illustrated by Fig. 3.

Adjacent to each cover is a flyleaf 19 composed of a metallic plate 20,around which is pasted a sheet 21 of glazed paper or similar material soas to completely envelop the.

same and extend outward beyond said plate, as best illustrated inFig. 1. Each flyleaf 19 is apertured along its inner edge for thereception of the prongs 13. At each of the apertures 22 the metal plates20 are bossed or bent inwardly as indicated in Fig. 1, and best shown inFigs. 2, 3 and 4. The sheets adapted to be held in the binder areindicated at 23. Such sheets are, of course, apertured for the receptionof the prongs 13, as indicated in Figs. 3 and 4. Y

The operating parts consist of the spring plate 1 and the several pairsof sheet-holding prongs 13. The flyleaves 19 operate to open the prongsas hereinafter explained.

The several layers of the covers should be pasted firmly together forthe sake of neatness and to fasten securely the binding strip 6 by meansof which the parts are held together.

The s ring plate 1 is made of resilient metal. FVhen the sheet-holdingprongs are in the closed position illustrated in Fig. 2, the jointformed by the tongue 14 and groove 15 is slightly below the level oftheedges 18 which engage the notches 17 so that the spring pressure of thespring plate 1 holds the sheet-holding prongs 13 in closed position.

The prongs 13 may be opened by pulling each pair apart separately by thefingers. As the prongs open they rock slightly on edges 18 as a centerso that their lower ends are raised, carrying the joint between thetongue 14 and groove 15 above the level of edges 18 so that the pressureof the spring plate 1 then serves to force the prongs apart and into theposition shown in Fig. 3. The opening movement of the prongs isterminated by the impact of tongue 16 against the lower edge of theopposite prong. To close the prongs they are moved together by thefingers. This movement lowers the joint of the prongs below the level ofedges 18 so that spring plate 1, at the moment the joint passes thecentral position, serves to snap the prongs 13 together and retain themin the position shown in Figs. 1, 2- and 4. The

sides of notches 12 serve to hold the prongs alinement.

1-3 from movement sidewise and in exact A more. convenient method ofopening the prongs to insert'or release a number of sheets isillustrated in Fig. 3 The sheets are parted at the selected points andturned back with ,\the -fiy-leav es and covers.- A slight prongs, themetal mu'nicated to all of the prongs by pressure on the sheets'at aboutthe outer edge of each metallic plate 20 will cause the several pairs ofprongs. 13 to open simulta-' neously. In using-lthis method of openingthe '0 plates -20 act as levers. The metallic plates 20 should be stiffenough so that the opening movement will be comessure at only .onepoint. The inward ossing or bending of the plates 20 raises the edges ofthe apertures 22 so that they will not catch in notcheskl'i inprongs-13. The bossing or bending at the apertures 22 also permitsthefiyleaves to nest around the prongs 13 when the binder is closed, asbest illustrated in and desire to secure.

. inner edges ofveach a erture.

2. In a temporary inder, a pair of metallic plates apertured for themating prongs and bossed or bent inwardly between each aperture and theinner edge of the plate to. form a groove in which a prong will lie whenthe binder is'closed. In a temporary series of mating prongs, and a pairof flat,

me'tallic plates apertured for the mating prongs and bossed or bentinwardly at the outer ed e of each aperture so that the 'plates-wilI notcatch in the joints between the spring, plate andthe mating prongs.

' 4. n a temporary binder, mating prongs; means to retain said prongs inopen or-closed gaged by said prongs and adapted to open binder, a springplate, a

position; and apertured metalhc plates enthe prongs whenpressedbackwardby the operator.

5. In a temporary binder, mating-prongs; covers; and a fly-leaf next toeach cover engagin themating prongs and composed'of a metal ic plateatits base covered by paper and having a paper wing or extension'outwardly. I

6. In a temporary binder, mating prongs jointed together, means toretain said prongs in open or closed position, a tongue 16 projectingsidewisefrom .one prong below-the joint between said prongs and adaptedto contact with the flat lower surface in the opposite prong to stop theopening movement of the prongs.

Signed at New day of June A. D., 1907-.

Witnesses:

,' JOSEPH A; STETsoN, M1N 1vrE K UFFMAN.

York city in the county of New York and State of New Yorkthis13thCLARENCE-D. TRU ss Lri. I

